Improvement in slide-valves



HERMAN H. MEYER, OF DENVER, COLORADO.

ATENT OFFICE.

IMPROVEMENT IN SLIDE-VALVES.

Specification forming part of Letters Patent No. 128,161, dated June18,1872.

Ic all whom t may concern:

Beit known that I, HERMAN H. MEYER, of Denver, in the county of Arapahoeand Territory of Colorado, have invented a new and useful Improvement inSteam -Valves5 and I do hereby declare the following to be a full,clear, and exact description thereof, which will enable those skilled inthe art to make and use the same, reference being had tothe accompanyingdrawing forming part of this specification, in which-drawing- Figure lrepresents a transverse section of a steam-cylinder, showing twomodifications of my valve, one being used as the steam-valve,

and the other as the exhaust-valve. Figs. 2

and 3 are inverted plan views of said two modiications of my valve.Figs. 4 and 5 are longitudinal sections of the same.

Similar letters indicate corresponding parts.

This invention relates to asteam-valve which opens two or more passa-gesto one port, and which is wedge-shaped, and provided with acorrespondingly wedge shaped cover, iitting closely to the valve onthree sides in such a manner that by my valve the freedom of the passageot the steam to or from the cylinder is insured, and, furthermore, bythe wedgeshaped cover the valve is relieved from the pressure ofthesteam on its back, and if the valve wears it wears tight, thewedge-shaped cover having a tendency to keep the saine close up to itsseat.

In the drawing', the letter A designates a valve, which is set edgewise,as shown in Fig. I, and which moves on the vertical seat B. In this seatis a port, a., which leads into the cylinder C; and said seat is alsoprovided with a depression, b, (see Figs. 4 and 5,) so that when thevalve is brought to the position shown in these figures steam passesthrough the body ofthe valve to or from the port (t in the mannerindicated by the arrows. The body ofthe valve A consists oi' two heads,c c', through which extends the valve-rod d, and which are I connectedby the sides e, (see Fig. 2.( These sides extend somewhat beyond thehead c', and between them are secured two cross-barsf, f,

Fig. 4, whereby the bearingsurface of the valve is increased withoutreducing the area of its steam-passages- My valve may, however, be alsoconstructed as shown at A* in Figs. 1, 3, and 5. By referring to Figs 3and 5 it will be seen that this valve Ai'6 is composed of two heads, c*ci, in which is secured the valve-rod dit, and if this valve is broughtin the position shown in Fig. 5 the steam passes through the same, asindicated by the arrows.

The alve A or A* is made wedge shaped, (see Fig. 1,) and over itis tteda cover, D, fitting the same closely on three sides, the top of saidcover being inclined to fit the back ot the valve. By these means thevalve is relieved from back pressure, and as it wears .downward theinclined top of the cover will keep it at all times close up toits seat,so that it will work steam-tight for a lon g time.

In constructing my valve I lirst plane and scrape its back and bothedges; then Iplane the threeinner sides of the cover, and tit it overthe valve; and, finally, the cover and valve are planed and scrapedtogether on the face to t on the seat. The cover is held in position byset-screws or in any other desirable manner.

What I claim as new, and desire t secure by Letters Patent, fis- Thewedge-shaped valve A, composed of two heads with cross-bars or strips, ff', in combination with an adjustable cover, D, fitting the same closelyon three sides, constructed and arranged substantially as shown anddescribed.

HERMAN H. MEYER.

Witnesses F. JENSEN, JOHN W. WEBSTER.

